Glasp is a free social web highlighter that allows users to collect, organize, and share highlights and notes from web pages and PDFs across devices.

NotebookLM is an AI-powered research assistant that helps users organize, analyze, and gain insights from their documents using Google's Gemini 1.5 Pro language model.

Wolfram|Alpha is a computational knowledge engine that provides expert-level answers by leveraging a vast collection of algorithms, data, and AI technology.